It won't change any minds among the flerfers. Commercial airline flights regularly go to 40,000 feet. You can see the curvature of the earth just fine at 40k feet.
It's clearer at 100k feet, but if you're intent on not seeing it then you still won't see it.
I have doubts that even orbit would change their minds. They've already gone through contortions about why it's night in some places when it's day in others. I am quite certain they're up to the task of explaining why they're over America now and then Africa, previously out of sight, a few minutes later.
It's just not worth arguing with those on intent on being stupid. They can simply say "no" and no power of evidence or logic can force them to do otherwise.
It's clearer at 100k feet, but if you're intent on not seeing it then you still won't see it.
I have doubts that even orbit would change their minds. They've already gone through contortions about why it's night in some places when it's day in others. I am quite certain they're up to the task of explaining why they're over America now and then Africa, previously out of sight, a few minutes later.
It's just not worth arguing with those on intent on being stupid. They can simply say "no" and no power of evidence or logic can force them to do otherwise.